How to use the symengine.Add._from_args function in symengine

def _set_linear_objective_term(self, variable, coefficient):
        # TODO: the is extremely slow for objectives with many terms
        if variable in self.objective.expression.atoms(sympy.Symbol):
            a = sympy.Wild('a', exclude=[variable])
            (new_expression, map) = self.objective.expression.replace(lambda expr: expr.match(a*variable), lambda expr: coefficient*variable, simultaneous=False, map=True)
            self.objective.expression = new_expression
        else:
            self.objective.expression = sympy.Add._from_args((self.objective.expression, sympy.Mul._from_args((sympy.RealNumber(coefficient), variable))))